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Launching apps from Xcode 5 to the iOS simulator (multiple OS versions) fails with SpringBoard failed to launch application with error: -3. I can get around the problem by 'turning it off and back on again' (quitting the simulator and relaunching, uninstalling and redeploying the app, etc.), but it seems to come back again later and in other projects.
Can someone help me understand what the real problem here is and if there is a permanent fix?
I don't know why, but on my end deleting the app from simulator solved this.
Quitting simulator seems to help.
Run Activity Monitor and force Kill the simulator process. Then Run you app again and simulator will launch automatically and problem goes away.
I think this may be because you have installed (run) it on 64bit iOS7 simulator and now you are trying to use same install/files on 32bit simulation.
1) Press stop button from Xcode
2) Exit Simulator
3) Press run button again from Xcode
This is the quickest workaround that I have tried, did not have to delete the app or do anything like that.
Restart simulator, if it wont solve your problem and then delete all content. It worked for me.
I noticed I started getting this error when manually editing files that are in the Emulator's disk space.
With "the Emulator's disk space" I mean a path similar to this one: ~/Library/Application Support/iPhone Simulator/7.0/Applications//.app/
Having the build process re-run solved my problems too so I feel like it has something to do with file permissions or some sort of checksum failure.
来源：https://stackoverflow.com/questions/18883942/how-to-permanently-fix-xcode-5-springboard-failed-to-launch-application-with-err